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Title: Torque ripple reduction in DTC of singlephaseopencircuit fault PM brushless
Authors: Utaikaifa, Kasem 
Issue Date: 2011
Publisher: University of the Thai Chamber of Commerce
Source: Kasem Utaikaifa (2011) Torque ripple reduction in DTC of singlephaseopencircuit fault PM brushless., 121-126.
Conference: (2011) Proceedings 2nd International Conference on Engineering and Industries 
Abstract: This paper presents a strategy to reduce torque ripple in direct torque control (DTC) of threephasepermanent magnet brushless (PMBL) motor having a winding opencircuit fault. An extra inverter leg is employed to supply voltage to motor neutral point during post fault operation. The zerovoltage vectors are utilized to reduce the torque ripple. Mathematic model of nonsinusoidalbackEMF PMBL motor is developed in which stator flux linkages and developed torque of the faulty motor are presented in a series function. To avoid the difficulty in variable estimation approximated models of stator flux linkages and developed torque based on fundamental component are established. Design of the proposed DTC is also described. The computer simulation shows that torque ripple can be reduced by the proposed method where zerovoltage vectors are utilized in the control scheme.Performances of the system with and without zerovoltagevectors in the scheme are presented and then validated by comparing with measured signals.
Rights: This work is protected by copyright. Reproduction or distribution of the work in any format is prohibited without written permission of the copyright owner.
Appears in Collections:RSO: Conference Papers

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